Bendix meyee



(No Model.) I

BMBYER:

DEVICE FOR PREVENTING THE EXPLOSION 0F BOILERS. N 370,641.

Patented Sept. 27,. 1887,.-

INVENTOR WITNESSES ATTORNEYS.

UNITED STATES PATENT UEEIQE.

BENDIX MEYER, OF GLEIWITZ, PRUSSIA, GERMANY.

DEVICE FOR PREVENTING THE EXPLOSION OF BOILERS.

SPECIFICATION forming part of Letters Patent No. 370,641, datedSeptember 27, 1887.

Application filed March 16,1887. Serial No. 231,137. v(No model.)Patvntel in Norway February 4. 1887, No.384; in Sweden February 4, 1887,No. 875; in England March 14, 1887, No. 3,849; in Be gium March 14,18:7, No. 76,695, and in Italy March 31, 1887, XLII, s51, XXI, 21,189.

To aZZ whom it. may concern.-

Be it known that 1, Barron: MEYER, a subject of the King of Prussia,residing at Gleiwitz, Kingdom of Prussia, German Empire, haveinventedcertain new and useful Improve ments in Devices for Preventing theExplosion of Steam-Boilers, (for which I have obtained patents asfollows: Great Britain, No. 3,849, dated March 14, 1887; Belgium, No.76,695, dated March 1-1, 1887; Italy, No. XLII, 351, XXI, 21,189, datedMarch 31, 1887 Norway, No. 384, dated February 4,1887, and in Sweden,February ,4, 1887, No. 875;) and Ido hereby declare the following to bea full, clear, and exact description of the invention, such as willenable others skilled in the art to which it appertains to make and usethe same, reference being had to the accompanying drawings, and toletters or figures of reference marked thereon, which form a part ofthis specification.

The object of my invention is to provide a new and improved safety-valveto prevent cxplosions of steam-boilers.

The invention consists of a plate or cover held on a packing surroundingthe outletsteampipe connected with the boiler, a weighted rod or stemholding the said cover or plate on the packing, and a stop to preventthe plate or cover from seating itself on the outlet-pipc after thepacking is removed or thrown out by the pressure of the steam from theboiler.

The invention also consists of various parts and details, andcombinations of the same, as will be fully described hereinafter, and.then pointed out in the claims.

Reference is to be had to the accompanying drawings, forming a partofthis' specification, in which similar letters of reference indicatecorresponding parts in all the views.

Figure 1 is a central sectional elevation of my improvement. Fig. 2 is asimilar view of a modified form of the same. Fig. 3 is a sec tional planview of the same on the line or w of Fig. 2. Fig. 1 is a centralsectional view of a modification of my improvement, and Fig. 5 is a planview of the same with the top cover removed.

My improvement is generally used in connection with the ordinarysafety-valve, and it is especially adapted to permit a surplus pressureof steam to escape rapidly, so as to prevent an explosion of the boiler.

The steam-outlet pipe A is secured to the boiler and is connected withthe steam-compartment of the same. At the upper edge of the pipe A isplaced the packing-ring B, of suitable material, and on thispacking'ring B rests a plate or cover, 0, adapted to slide vertically insuitable guides. On the top of the plate or cover 0 rests a stem or rod,D, passing through a guide, E, and provided with a collar, F, adapted torest on top of the said guide E when the packing B is removed. The guideE is secured to a plate, G, fastened to an extension, H, of the pipe A,which is also provided with an outlet,'A. packing-ring B is in theposition shown in Fig. 1, then the plate or cover 0 rests on the same,while the collar F does not touch the guide E.

On the stem or rod D presses the weighted lever I, so that the stem Dholds the packingring B tightly in place on the upper edge of the pipe Aby the cover or plate 0. The weighted lever Iis set to exert on theplate or cover 0 a pressure which exceeds slightly the normal pressureto which the regular safetyvalve is set, so that when the latter doesnot permit the steam to escape in sufficient quantities to prevent anexplosion, then the plate 0 is moved upward, thus permitting the steamto escape through the outlet A, and at thesame time the steam carriesoff the packingring B, thus enlarging the opening between the upper edgeof the pipe A and the cover or plate 0.

The collar F of the stem or rod D seats itself on the guide E, so thatthe plate 0 is held above the edge of the pipe A until all the steam hasescaped from the boiler, an explosion being thus prevented.

The plate 0 may be rigidly secured on the stem or rod D, as shown inFig. 1, or it may simply rest on the plate, as illustrated in Figs. 2and 3. The stem D, instead of being connccted with a weighted lever, I,as shown in Figs. 1 and 2, may be secured to a half cover, J, resting onthe extension H of the pipe A.

When the The operation of the two modifications just described is thesame as the one above referred to in Fig. 1.

Instead of exerting a pressure on the stem D by means ofa weighted leveror heavy cover,

as shown, I may also employ springs to perform the same duty.

Having thus fully described my invention, I claim as new and desire tosecure by Letters Patent- 1. In a safety-valve, the combination, with astean1-outlet pipe connected with the boiler, ofa packing-ring held onthe upper edge of the said pipe, a cover or plate held on the said ring,a stem pressed on the said cover, and means, substantially as described,for limiting the motion of the said stem, as set forth.

2. In a safety-valve, the combination, with a steam-outlet pipeconnected with the steamcompartment of the boiler, of a packing-ringheld on the upper edge of the said outlet-pipe, a cover or plate held onthe said packing-ring,

a stem pressed on the said cover, and a stop secured to the said stemfor limiting the downward motion of the said stem, substantially asdescribed.

3. In a safety-valve, the combination, with a steam-outlet pipeconnected with the steamcompartment of the boiler, of a packing-ringheld on the upper edge of the said pipe, a cover or plate held on thesaid packing-ring, a stem pressed onv the said cover, a guide throughwhich the said stem passes, a. collar fastened 011 the said stem tolimit its downward motion, and means, as described, for exertingpressure on the said stem, substantially as shown and described. I

In testimony whereof I affix my signature in presence of two witnesses.

BENDIX MEYER.

\Vitnesses:

B. SCHNAOKENBURG, J os. HERTRAMPF.

